legato.lua

--------------------------------------------------------------------------------
--! @example legato.lua
--------------------------------------------------------------------------------

local notes = {}

Fade = Knob("fade", 40, 10, 100)
Retrigger = OnOffButton("retrigger", false)
local sampleOffset = 50 -- ms

function onNote(e)
    if #notes > 0 then
        local fadetime = Fade.value
        fadeout(notes[#notes].id, fadetime, true)
        local id = postEvent(e)
        table.insert(notes, e)
        setSampleOffset(id, sampleOffset)
        fadein(id, fadetime, true)
    else
        local id = postEvent(e)
        table.insert(notes, e)
    end
end

function onRelease(e)
    for i,noteon in ipairs(notes) do
        if noteon.note == e.note then
            table.remove(notes, i)
            releaseVoice(noteon.id)

            local shouldRetrigger = Retrigger.value and #notes > 0 and i > #notes
                    
            if shouldRetrigger then
                local noteon = notes[#notes]
                local id = playNote(noteon.note, noteon.velocity)
                noteon.id = id              
                local fadetime = Fade.value
                setSampleOffset(id, sampleOffset)
                fadein(id, fadetime, true)
            end
                            
            break
        end
    end
end